Coke oven



Jan. s, A192.5. .u Hl LEWHUSER 1,986,330

COKE OVEN Filed Nov.. 15, 1931 the technical rule given in the above paragraph with respect to the minimum section of the upper connecting opening, the quantity of the gas passing upwards mixing with the waste gas can 'be regulated. Such a regulation of the circulating current,c aiordsV the advantage, that `thetempermis-.of'ihe-liatihglflue lated. l

Furthermore, an object of the invention isto of an adjustment of the upper connecting pen ing between the two heating ues,vth the lower connecting openi the pressure and draught .ce i ionsprevailinggm a pair of heating iiues. For this purpose ther at the lower connecting opening ulate the eiective free cross-sectional"areai'of per opening, the: loweropeningrlisaiwaysfsinaller than the upperlop'ening. il; Preferably;acc'ording' tothis'invention, the low-l er circulation opening .is 'kept so largethat it-des not .exceed three-fths ofi the lrsectionof 'the 'uppe'r connecting'.opening betweenthe4 two flues. The stepsy taken.das`indicatd above*='ini orderl to bring'the lower 'connectionsopening between the two heatingiiues at Itimesinto a certain relation to. the. upper.-v connection .opening 'b'etween 'the heating fluesis especially important-in case that acoke oven with a Viewl-'to-reducing itsicapacity is witha smaller quantityof gas thanisusual. In thisrcasathe .dynamic` energy -of-fthe gases rising ris'. reduced :and therefore the ydanger .that the .combustion gases .at-oncepass over through the lowery opening between-'two .vheatinguesl into the heating flue through'which'thega'ses Ipass fromabove below istes'peciallygreat. L" The lower connectiorriopeningifis accordingly made `-smaller than thev upper yconnecting 'opening especially. in the degreeindicated `by` meas the constructionpreferred',i the J resistancek owing; to frictionin the'zlowerzconnection opening isf'al# ways kept considerabl largerfthan the upper connectionlopening. frif Thestepsindicatedfbyfme-.for -the regulation fof vthe vgas zcurrent inl-'the so-called circulation'- `ovensis further fof. special importance for.-v the heating iup" Aof vrthe .:pairs'f'of :heating 'flues at..the endof each: heating wall. .i y'I'lmtoutside of `the'two heatingflues ofthe heating nues-.set is,"a`s1 have 'ascertained in practical operationfin manyr cases,

cooler than lthe inner .one of theheating 'ues of -thi'soutside pair ofiuesr.Therefore fit often .happensthatiinthe case iof the :burning of .the gas upwards.:in..v the outside heating nue, short .circuit occurs :at :the flower'. connection opening.

' 'By 'the increasing 'of the: ei'ective freeflcross-sectional area .ofatheabovel connection opening and :the.reduction.of the eiiective free' cross-sectional K area .of .the lowerffconnectionoven ,according-to v this invention, this. evil lcan be done-awaywith. In addition to the. general objects recited above, the f.. invention: has'Vv for vfurther objects such Lother improvementsgroradvantages as are found toobtain inthe structures and devices-hereinafter descrbedz.Unclaimed1 vv/i1 j' *Inl the n:accompanying drawingf forming` av part of l .this. specification,::andi,showing, foriv .purposes .o'f .exemplication ,1' aqprefeired form. .and man.- ner in which the invention may .b eembodiedand practiced;4 but.. vs'fithou't'f limiting the claimed .in-

'.vention to: such :illustrative instance.- orinstances:

,g 1'igure..-1"I relgiresentsia'yertical-sectionfv through d fseirtional dampers 30 being ...omitted for clearness of illustration; provide suitable means in order that in'the casev ftional view of the same but with the dampers 30 Fig. 4 is an enlarged detailed perspective secin posivtionIfKor adjustment;

Fig. 5jis aplanview of one of many forms of ..dampers.26`;for,prevention of reduction of con- H'necti'jn 25- to. zeroi are provided according to thisinvention means rde to--r'eg In the case ofthe-'coke ovens shown in Fig. 1

eoldair 'enters through the opening 1 in the sole Achannel "2 of -the regenerator 3 which as usual the lower connecting opening; these means, how-f5.3 ever, are so formed that by any width of the up- Y .enA iloylean'- gas, thecOldwIeangas is ledinto the ysole channelsflO.- of the regenerators 9 which .are

,arrangedlbetween the.regenerators f` 3l `in the aun.- derpartl of the oven.r The regenerators 9*.-Hare similar' to the regenerators 3 connected upv with the heating `wall lyingv above. by .the roof chan". z .'v *n .u n "f 'f w v .In case it-is 'intendedto run theoven shownfon the .drawing with* yrich gas, lco1d-combustion Vair `is .g passed j throughall the 1 regenerators of the oven'whilst `the rich gas isled forward to the :.hori'.- zontal channels 12 which are connectedup. by

the branch channels-.13 with the respective heat-4 the bottom of oneufvertical heating flue which are provided, in thewall betweeni-the coking cham'- rbers14; Ascan be seen fromUFigure 1, the Iiues in; each `Iofv the. pairs of 'the vertical heatingflues are .connected up` with 'one another in sucha way that4 the ymediumsV passed forward in :the heating {nuesrlthrough thechannels 5, v1,1 andl stream upwards under the combustion-ofthe heating gas rand pass off in theheating iiues 16 interchangeably with the flues 15. f

FromV the bottom of'thefheating. lues` 16;;,the 5 combustion gasesypass over into the channels 17, v18 and V19,A 20 respectively of whichy the channels 18. passNto--a sole :channel 21` which is connected `uployan inclined channel22v with the regenerae tor k23 on theupperAv end lof `which the channels 20 ppen. The Gl12innels`17and-1V9 areconnected up .with the. adjoining regenerator and its horizontal channel.

7; ,The hot Waste gasesy pass throughthe .restorin- "erators 23 and `the other regeneratorsmof the same. oven half from the aboveyzdownwards, 'heat up thechequer bricks in these ,regenerar .tors and pass oitY then through fthe..sole;channe1 24 of the regenerators to the chimney.,;3,..=.; .1 yAscan be seen from .Figure f1, the upper connecting passageways 25g-between theV .n heat- .fing'fluesgl and 16 are controlled ibygthe .dampers .26 which canbe workedffromthe roofof` the; coke .oven battery through the .channels 27. fj

,agg-' '.Ihe.n heating j nues 15 ..and..1.6 ,are .connecten-1,', up y75 moreover with one another by` an'opening 29 at j the lower end of the wall 28 dividing the heating l flues. Through this opening a certain quantity4 of waste gas can pass out fof the heating flues 16 into the heating flues 15. The combustion gases i in the heating 4flues 15 are thinned,l down by the waste gases"`introduced from below into the r heating flues 15so that thesecombustion gases burn in the heating ues 15 with a ilong flame approximately extending over the whole height of lthe heating ues.

`The quantity of the waste'gases passing over through the openings 29 inthe heating flues 15 ,will be regulatedbyaltering the effective free cross-sectional area of `the upper connecting opening 25, whereby the eiective free cross-sectional area of the lower opening 29is, so adjusted fatthe time by means of the dampers 30 that the lower openings 29 are always smaller than the respective upper openings 25. i

t Preferably in this connection the effective free cross-sectional area of the lower `connecting openings 29 are lchosen of aboutfthree-fths of n `the section of the `upper connection passageways 25.

As usual, in the` case of time is changed in sucha manner that the cold held up at a certain point.

n `lean gas and the cold air are passed through the regenerators which have been previously heated "up by the passage of waste gases.v The gases then pass through the heating flues 15 and 16 also in reversed direction.

The size of the damper `26 is so dimensioned 1 that the upper connecting opening can never be entirely closed but this opening may only be reduced to such an extent'that the heatinggases at the slighest impingement of the oven at least may pass ofi from the one heating flue of each pair or group of heating flues. In this manner any mistakes in the running of the oven are There may be other means employed in order to avoid any reduction of the effective free crossi sectional area of the Vupper opening above a certain degree for instance projections or the like through which the movement of the damper is I wish to be understood that Ido not desire to be limited to the exactdetails shown' and described, for obvious modifications will occurto a ,person skilled in the art.

I claim:

1. In a coke oven, a` coking chamber, combustion heating meanstherefor comprising vertical combustion iiues operable in alternation for up- `i'iow combustion of gas and air and down-110W of oil-flow waste gas, the combustion flues being operatively disposed in` pairs or groups with communicable connections at theirupper and lower ends in such manner that part of the ues of each pair or group are operable for up-flow combustion while the remaining flues of the same pairs or groups are operable toreceive and flow the waste gas thereof` downwardly, and part of the gas may pass through the lower communicable connections of a pair or group from the flue operable for down-flow', into the flue operable for upthe coke oven shownV on the drawing, the path of the gas after a certain flow ofthe same pair or group, while the remaining partof the waste gas is exhausted from the Awith communicable connections at their upper and lower ends in such manner that part of the flues of each pair or;group are operable for upflow combustion while the remaining iiues of the same pairs or groups are operable to receive and flow the waste gas thereof downwardly, `and part `of the waste gas may pass through the lower communicable connections of apair or group from i the ue operable for downow into the iiue operable for upflow of the same pair or group, while the remaining part of the waste gas is exhausted from the pairor group and` in which the maximum effective cross-sectional area of the lower communicable connection cannot exceed threefifths of the b minimum effective cross-sectional area of the upper communicable connection.

`3. In a cokel oven, a coking chamber, vertical heating ues therefor operable in alternation for up-ow combustion` and down-flow of combustion products, and operatively disposed in two sets arranged in a row and operable in alternation with each other and communicably connected at their upper ends for exhaust of combustion products'from each other in alternation, a communicable connection between the lower ends of iiues* of said two sets-fior recirculating part of the waste gas `from a ue operable for exhaust into a flue operable for up-flow combustion, andadjustable meansfor regulating the eective cross-sectional area ofboth the upper and the lower communicable connections.

4. In a coke oven, a coking chamber, vertical heating ues therefor operable in alternation for up-ilow combustion and down-flow of combustion; products, and operatively disposed in two ysets arranged ina row and operable in alternation with each other and communicably connected at their upper ends for exhaust of combustion products from each other in alternation, a communicable connection between the lower endsof flues of said two sets for recirculating part of the waste gas from a ue operable for lexhaust into a ilue operable for up-i'lowcombustion, and adjustable means for regulating the effective cross-sectional area of both the upper and the lower communicable connections, the

adjustable means for the upper and lower comb municable connections being adapted to maintain the lower openings always smaller than the upper openings of the upper communicable connections.

HEINZ LEITHUSER. 

